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Ferrofluid on glass, with a rare-earth magnet underneath. A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements.Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.
Samarium–cobalt magnets have maximum energy products (BH max) that range from 14 megagauss-oersteds (MG·Oe) to 33 MG·Oe, that is approx. 112 kJ/m 3 to 264 kJ/m 3; their theoretical limit is 34 MG·Oe, about 272 kJ/m 3. Sintered samarium–cobalt magnets exhibit magnetic anisotropy, meaning they can only be magnetized in the axis of their ...
Of the more commonly available magnets, only rare-earth magnets such as neodymium and samarium-cobalt are stronger. Alnico magnets produce magnetic field strength at their poles as high as 1500 gauss (0.15 tesla ), or about 3000 times the strength of Earth's magnetic field .
A U.K.-based company announced last week that they’d successfully developed, in just three months, a magnet that doesn’t use rare earth metals at all using AI—according to the company, that ...
The diamagnetic boron atoms do not contribute directly to the magnetism but improve cohesion by strong covalent bonding. [3] The relatively low rare earth content (12% by volume, 26.7% by mass) and the relative abundance of neodymium and iron compared with samarium and cobalt makes neodymium magnets lower in price than the other major rare ...
Canonical examples of nanomagnets are grains [1] [2] of ferromagnetic metals (iron, cobalt, and nickel) and single-molecule magnets. [3] The vast majority of nanomagnets feature transition metal ( titanium , vanadium , chromium , manganese , iron, cobalt or nickel) or rare earth ( Gadolinium , Europium , Erbium ) magnetic atoms.